Hair colorants
AssigneeClairol Incorporated
InventorsBryan P. Murphy, Gabriella Wis-Surel
Life of this patent
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Abstract
Certain dispersant free substituted diaminoanthaquinone colorants are useful in hair dye compositions to more intensely color hair. Coloring kits, mousses, gels, and aerosols may contain the compositions.
Claims13
In an aqueous composition for coloring keratinaceous substrates, said composition containing (a) a mixture of two or more dyestuffs, one of which being a substituted 1,4-diaminoanthriaquinone of formula I:
- ##STR2## wherein X is C.sub.1-8 alkyl, C.sub.1-8 haloalkyl or C.sub.1-8 aminoalkyl:
- Y is a hydroxy-substituted C.sub.1-8 alkyl group containing 1 to 4 hydroxyl groups and 0 to 4 amino groups, or a C.sub.1-4 alkyl group;
- A and B are independently selected from halo, X and Y;
- m=0-4;
- and
- n=0-2;
- (b) an organic carrier for the dyestuffs, and (c) water, wherein the improvement comprises the compound of formula I being in a dispersant-free form and, whereby, upon dyeing, the keratinaceous substrates are dyed more intensely.
A process for coloring a keratinaceous substrate comprising the step of contacting the substrate with an aqueous composition which contains:
- (a) at least one dispersant free first colorant of formula I:
- ##STR3## wherein X is C.sub.1-8 alkyl, C.sub.1-8 haloalkyl or C.sub.1-8 aminoalkyl;
- Y is a hydroxy-substituted C.sub.1-8 alkyl group containing 1 to 4 hydroxyl groups and 0 to 4 amino groups, or a C.sub.l-4 alkyl groups;
- A and B are independently selected from halo, X and Y;
- m=0-4;
- and
- n=0-2;
- (b) at least one second colorant optionally containing a dispersing agent;
- and
- (c) an organic carrier for the first and second colorants.
The process of claim 12 wherein (a) is 1-methylamino-4-(2-hydroxyethyl)-aminoanthraquinone.
A method of enhancing the depth of color imparted to a dyed keratinaceous substrate comprising contacting the substrate with a dye composition made by mixing a dispersant-free anthraquinone dye of formula I with one or more conventional dyes, said mixing taking place in the presence of a carrier for the anthraquinone dye, wherein formula I is:
- ##STR4## wherein X is C.sub.l-8 alkyl, C.sub.l-8 haloalkyl or C.sub.l-8 aminoalkyl;
- Y is a hydroxy-substituted C.sub.l-8 alkyl group, containing 1 to 4 hydroxyl groups and 0 to 4 amino or C.sub.l-4 alkyl groups;
- A and B are independently selected from halo, X and Y;
- m=0-4;
- and
- n=0-2.
Dependencies are inferred from the claim text.